Siphon.



PATENTED MAY 12,1903.r-

, w, Il.

SIPHON.

Ile/g 2 S. W. MILLER.

APPLIGATION FILED DEO. 15, 190.2.

No MoDEL.

NiTED STATES Patented May 12, 1903.

PATENT OFFICE.

SIPHON.

SPECIFICATION 'forming part of Letters Patent N o. 727,991, dated May 121 1903.

Application'filed December 15,1902. Serial No. 135,190. (No model.)

siphons for automatically discharging the con tents of liquidtanks, and refers more specific'- ally, rst, to an improveddouble-trapped siphon, or one having in addition to a trapped outlet-limb an auxiliary trap having a less depth of seal than the main trap and the forcing of which sets the siphon into opera'- tion, and, secondly, to a time-siphonapparatus designed to intermittently discharge a liquid tank or receptacle in such manner that the tank or receptacle after it has once beenlled remains filled for a determined period and is thereafter automatically discharged through said siphon. The construction, so far as it relates to a time-Siphon, is applicable for use to intermittently discharge the contents of a iilter or bacteria-bed constituting part of a sewage-purifying plant, though it is obvious that the apparatus or modifications thereof may be employed wherever it is desired to intermittently charge or discharge a liquid tank or receptacle.

In the drawings, Figure l is a vertical section of an apparatus embodying the features constituting my invention. Fig. 2 is a detail taken on line 2 2 of Fig. 1.

As shown in said drawings, A designates a tank Which may constitute a part of or be connected with a tank containing a filter or contact-bed in which sewage after leaving the septic tank is exposed for determined periods.

discharge into a conduit leading to a-suitable vplace for the disposal of the liquid. The trap C. of Vsaid siphon is so proportioned that the maximum depth of liquid which the tank is designed to receive does not produce sufficient head or pressure to set the siphon intoI the tank A has been filled, so that said tank A after being filled remains filled for a de' sired length of time.

Communicating with the siphon is an auxiliary-trap, comprising a longer limb D and a shorter limb D', which are connected at the lower end of the trap by a short transverse pipe d. The longer limb of the trap communicates with the siphon by means of a connecting-pipe D2, which may enter the siphon at anysuitable place, but is shown herein as curved downwardly, and extends through the bell or shorter limb ofthe siphon and a distance into the longer limb thereof. Said auxiliary trap is shown as located in a chamber E at one side of the tank A and which contains the timing. mechanism hereinafter to be described, though the trap may be otherwise located. Said auxiliary trap, as before stated, has a less depth of seal than that of the main trap.

The auxiliary or supplemental pressure relied upon to set the siphon into operation is applied directly to the auxiliary trap, and such application of pressure is applied by devices made as follows: F designates a downwardly-opening bell located in the chamber E,`said bell in practice being supported in any suitable manner in said chamber. designates an inverted- U-shaped pipe, one end of which communicates with the top of the bell F and the other end of which communicates With the auxiliary trap, being herein shown as communicating with the bottom connection-pipe d of the auxiliary trap. The upper or closed part of said pipe extends above the maximum level to which the liquid rises in the chamber E, so as to prevent iioodingof the trap through the bell and connecting-pipe. Said tank E is filled from the main tank A by means of a pipe G, one end of which is submerged in the liquid of the tank A when the latter is filled or nearly filled. Said filling-pipe is provided with a valve, whereby the period of time required for filling the tank E therethrough may be varied for the purpose of producing corresponding variations ot' time in which the tank A remains filled.

In the operation of the device as thus far described the tank A is filled; but the pressure due to the liquid-head therein is not snflicient to set the siphon in operation to empty the lsame. After the tank A is iilled above the level of the highest part of the filling-pipe G the chamber E begins filling from the tank A, and as the liquid rises in the tank E and submerges the bell F pressure is exerted in said bell and pipe F and is transmitted through said pipe to the auxiliary trap. The liquid continues to rise in said chamber E until suiiicient pressure is generated in said bell and pipe F to force the auxiliary trap, at which time pressure in the siphon is released through said auxiliary trap and the siphon set in operation. Thereafter the tank A is emptied through said siphon in the usual manner.

Means are provided for refilling the auxiliary trap after the air in the siphon has escaped therethrough, and, as herein shown, said trap is filled from the liquid in the tank A prior to the passage of the liquid into said siphon. Such refilling means consists ot' a pipe H, communicating with the pipe D2, which connects the auxiliary trap with the siphon, said pipe H depending from said connecting-pipe and being submerged in the liquid of said tank when said tank is iilled. Said pipe H and the connecting-pipe D2 are wholly submerged in th'e liquid contents ofthe tank A when the latteris filled toits maximum level, so that after the auxiliary trap is forced and the siphon begins operation the liquid rushes through the pipes H and D2 and reiills the auxiliary trap. Said refilling-pipe H is shown in Fig. 2 as extending a distance above said connecting-pipe, so as to insure that liquid from the tank A will not fill the auxiliary trap prior to a sufiicient evacuation ot' air from the siphon through said auxiliary trap, and is made larger than the pipe D2, so that although water passes both ways in the pipe D2 from the pipe H a sufficient quantity will be directed to the auxiliary trap to properly ll the same. It will be observed that the pipe H constitutes not only a refillingpipe for the auxiliary trap, but constitutes, in connection with the pipe D2, a venting device, whereby the siphon is vented after each operation thereof. l

The feature of my device just described is claimed in a copending application filed by me on the 24th day of November, 1902, Serial No. 132,546.

Means are provided for emptying the timing-chamber E after each operation of the .may be varied.

siphon to empty the tank A. Such emptying of the timing-tank is eiected through a siphon I, which discharges the contents of the chamber through the main siphon. Said siphon I communicates with the main siphon through the medium of a pipe I, which enters the longer limb of the main siphon, as herein shown, above the sealing-level of the trap C. The intake-limb of said siphon I is shown as continued downwardly below the level of the fioor of the chamber E into a Well E a sufcient distance to seal the same and prevent the escape of air from the main siphon therethrough. The pipe I' ot' the timing-chamber siphon may enter the trap of the main siphon below the sealing-level thereof,in which event the outletlimb of the siphon I may be made of such length that the column of liquid therein will overbalance the maximum pressure in the siphon, and thereby prevent the escape of air from the main siphon through the timing-chambersiphon. In the construction last mentioned the intake-limb of the timingchamber siphon need not be sealed. The arrangement herein shown is a preferable one, however, as it avoids the embedding of the con necting-pipe I/ in the concrete foundation ot' the apparatus, such as would be necessary if said pipe entered the trap ofthe main siphon below the sealingdevel thereof.

So far as is concerned the use with the main siphon of an auxiliary trap which is adapted to be refilled from the liquid in the tank A before the passage thereof into the siphon which empties said tank the means for supplementing the pressure ofthe auxiliary trap Moreover, the auxiliary trap may be located otherwise than in the timingchamber, as shown. Other changes may be made in the structuraldetailsillustrated, and I do not wish to be limited to such details except as hereinafter made the subject ot' specific claims. derstood that the combinations set forth in the several claims are intended to be separately claimed without reference to the struc ture in connection with which they are illustrated and not mentioned in such claims.

I claim as my inventionl. The combination with a tank and a siphon for emptying the same and having a trapped discharge-iimb, of an auxiliary trap for said siphon having a less depth of seal than that of the main trap of the siphon, means for reiilling said auxiliary trap after each operation of the siphon from the liquid in the tank before it has passed into the siphon, and a supplemental pressure device connected directly with said auxiliary trap for forcing the trap and thereby starting the siphon into operation.

2. The combination with a tank and a siphon for emptying the same and having a trapped discharge-limb, of an auxiliary trap 'for said siphon having a less depth of seal than that of the main trap of the-siphon, means for refilling said auxiliary trap after It is to be furthermore un-` IOO IIO

'eachoperation of the Siphon from the liquid in the tank before it has passed into the siphon, and a supplemental pressure device connected directly with the auxiliary trap and controlled by the liquid Supplied from Said tank for forcing the Said auxiliary trap and thereby Starting the Siphon into operation.

3. The combination with a tank and a siphon foremptying the same having a trapped discharge-limb, of a timing-chamber which is lilled from said tank, an auxiliary trap for said Siphon, having a less depth of seal than that of the main trap of'the Siphon, means for refilling Said auxiliary trap after each operation of the Siphon from the liquid in Said tank prior to its passage to said Siphon, a downwardly opening bell located in said chamber, and a pipe connected at one end with Said bell and at its other end with Said' auxiliary trap.

4. The combination with a tank and a Siphon for emptying the Same having a trapped. discharge-limb, of a timing-chamber which is filled from said tank, an auxiliary trap having a less depth of Seal than that ofthe main trap of the Siphon, means for relling said discharge-limb, of a timing-chamber Whichi is filled from Said tank, an auxiliary trap connected with Said Siphon and having a less depth of Seal than that of the main trap ofv the Siphon, a downwardly-opening bell lo cated in Said chamber, a pipe connected at one end with said bell and at its other end with Said auxiliary trap, and a Siphon located in Said chamber and connected with the main Siphon for emptying said chamber.

6. The combination with a tank and a siphon for emptying the same having a trapped discharge-limb, of a timing-chamber which is lilled from said tank, an auxiliary trap connected with said Siphon and having a less depth of Seal than that of the main trap of said Siphon, a downwardly-opening bell located in Said chamber, a pipe connected at one end with Said bell and at its other end said chamber and connected with the main Siphon for emptying Said chamber, and means the Siphon, means for refilling Said auxiliary I trap after each operation of the Siphon from the liquid in the tank before its passage into the siphon,a downwardly-opening bell located in Said chamber, a pipe connected at one end with Said bell and at its other end with said auxiliary trap, anda second Siphon located in said chamber and connected with the'main Siphon for emptying said chamber'.

8. The combination with a tank and a siphon for emptying the same having a trapped discharge-limb, of a timing-chamber which is lilled from Said tank, an auxiliary trap connected with Said Siphon and havingva less depth of seal than that of the main trap of the Siphon, means for refilling Said auxiliary trap after each operation of the l Siphon, .la downwardly opening bell located in `said chamber, a pipe connected at one end with Said bell and at its other end with said auxiliary trap, anda second Siphon located in Said chamber and connected with the main Siphon for emptying Said chamber, Said chamber being provided with a well and the receiving end of the Second Siphon being adaptedto-extend into Said Well.

9. The combination with aitankand afsi 4phon for emptying the Same having a trapped discharge-limb, of a timing-chamber which is filled from Said tank, an auxiliary trap located in Said chamber and connectedvvith said siphon, a supplementall pressure device located in Said chamber and connected directly with the auxiliary trap for forcing thesarnetostart the Siphon into operation, and means'for emptying said auxiliary tank through said Siphon.

lO. The combination with a tank and a Siphon for emptyingthe Same having a trapped discharge-limb, of an auxiliary trap forsaid Siphon, a pipe connecting said auxiliary trap withthe siphon,and means for relling Said trap from the liquid in Said tank, comprising a pipe communicating with the pipe connecting the auxiliary trapwith the Siphon and adapted to be submerged in the liquidin Said pipe. Y ln testimony that I claim theforegoing as my invention I affix my signature, in presence Witnesses:

WILLIAM L. HALL, GERTRUDE BRYcE.

`I '[0 tank when the latter is iilled, Said iillingpipe f extending a distance above said connectingof two witnesses, this 5th day off December,

SIDNEY W. MILLER. 

